A fully coupled hydro-thermo-mechanical model for the spontaneous combustion of underground coal seams
文献类型：期刊论文
| 作者 | Xia, Tongqiang1,2,4; Zhou, Fubao2,3; Liu, Jishan5; Kang, Jianhong2; Gao, Feng4 |
| 刊名 | FUEL
 |
| 出版日期 | 2014 |
| 卷号 | 125页码:106-115 |
| 关键词 | Spontaneous combustion Coupled processes Thermo-mechanical effects Self-accelerating-heating |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2014.02.023 |
| 英文摘要 | The spontaneous combustion of underground coal seams involves complex interactions between geomechanical effects, oxygen transport and flow, and energy transport in the porous coal media. Prior studies normally ignore the thermo-mechanical effects such as gas and coal expansion due to the self-heating of coal, and have not implemented these complex interactions fully into their simulations. In this study, a fully coupled model of coal mechanical deformation, gas flow and transport, and heat transport is developed and their complex interactions are defined through a suite of coal property models and equation-of-states. These include (1) coal porosity model; (2) coal permeability model; (3) gas equation-of-state; and (4) self-heating model. Applying the model to quantitatively predict the time and locations of spontaneous combustion of underground gob-side entry in the Dongtan coal mine, the results are in good agreement with the in situ measurements. Besides, a significant self-accelerating-heating effect induced by the gas thermal expansion and subsequent gas pressure gradient increase is found in the self-heating process of coal [GRAPHICS] through the comparison results from our model with other models. Furthermore, the self-heating susceptibilities of gob-side entry associated with extrinsic and intrinsic factors, incorporating coal permeability, pressure difference, oxygen-consumption rate, and reaction heat of coal oxidation, are gained insight using the verified model, which suggests the self-heating rate and gas velocity are positively correlated with above factors showing "S-type" upward trends, whereas the oxygen concentration has an "S-type" downward trend. The simulated results can provide some suggestions as to how to control the variables or parameters to retard or suppress the spontaneous combustion of porous coal media. (C) 2014 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000333402900014 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3600]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.China Univ Min & Technol, Key Lab Gas & Fire Control Coal Mines ; 3.China Univ Min & Technol, State Key Lab Coal Resources & Safe Min ; 4.China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn ; 5.Univ Western Australia, Sch Mech & Chem Engn |
| 推荐引用方式 GB/T 7714 | Xia, Tongqiang,Zhou, Fubao,Liu, Jishan,et al. A fully coupled hydro-thermo-mechanical model for the spontaneous combustion of underground coal seams[J]. FUEL,2014,125:106-115. |
| APA | Xia, Tongqiang,Zhou, Fubao,Liu, Jishan,Kang, Jianhong,&Gao, Feng.(2014).A fully coupled hydro-thermo-mechanical model for the spontaneous combustion of underground coal seams.FUEL,125,106-115. |
| MLA | Xia, Tongqiang,et al."A fully coupled hydro-thermo-mechanical model for the spontaneous combustion of underground coal seams".FUEL 125(2014):106-115. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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